viceregal /vaɪsˈɹiːɡəl/adjective 2noun 2forms 1 adjective2 •Of, or pertaining to, a viceroy or viceroyalty.This engine was used for hauling Viceregal trains, and was painted royal blue. — 1953 •Of, or pertaining to, a viceregent or viceregency. noun2 •a viceroy •[usually plural] a viceroy or vicereineMarch is a month of farewells for the Governor of Victoria and his wife (Earl and Countess of Stradbroke). who are leaving early in April for England, via America. — 1926 formsviceregals